Update README.md

Author: 0xkookoo

README.md

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 <div align="center">
-    <a href=""> <img src="images/readme_badges/WechatIMG649.jpeg" width="350" height="150"></a>
+    <a href=""> <img src="images/readme_badges/WechatIMG649.jpeg" width="400" height="150"></a>
     <br>
     <a href=""> <img src="https://img.shields.io/badge/%3E-awesome-red.svg"></a> <a href=""><a href="https://github.com/apachecn/awesome-leetcode/tree/master/docs/Algorithm_Implementation/Python"> <img src="https://img.shields.io/badge/%3E-algorithm-red.svg"></a> <a href="https://github.com/apachecn/awesome-leetcode/tree/master/docs/Leetcode_Solutions/Python"> <img src="https://img.shields.io/badge/%3E-leetcode-red.svg"></a> 
 </div>